Lord Caitanya next informed Sanātana Gosvāmī that there are different forms of svāṁśa as well, and these are divided into the Saṅkarṣaṇa division and the incarnation division. The Saṅkarṣaṇa division includes the three puruṣa-avatāras—Kāraṇodakaśāyī Viṣṇu, Garbhodakaśāyī Viṣṇu and Kṣīrodakaśāyī Viṣṇu—and the other division comprises the līlā-avatāras, such as the Lord's incarnations as a fish and a tortoise.
There are six kinds of incarnations: (1) the puruṣa-avatāras, (2) the līlā-avatāras, (3) the guṇa-avatāras, (4) the manvantara-avatāras, (5) the yuga-avatāras and (6) the śaktyāveśa-avatāras. Out of the six vilāsa manifestations of Kṛṣṇa, there are two divisions based on His age, and these are called bālya and paugaṇḍa. As the son of Nanda Mahārāja, Kṛṣṇa in His original form enjoys both of these childhood aspects—namely bālya and paugaṇḍa.
We can conclude that there is no end to the expansions and incarnations of Kṛṣṇa. Lord Caitanya described some of them to Sanātana just to give him an idea of how the Lord expands and how He enjoys. These conclusions are confirmed in Śrīmad-Bhāgavatam (1.3.26). There it is said that there is no limit to the incarnations of the Supreme Lord, just as there is no limit to the waves of the ocean.
Kṛṣṇa first incarnates as the three puruṣa-avatāras, namely the Mahā-viṣṇu or Kāraṇodakaśāyīavatāra, the Garbhodakaśāyīavatāra and the Kṣīrodakaśāyīavatāra. This is confirmed in the Sātvata-tantra. Kṛṣṇa's energies can also be divided into three: His energy of thinking, His energy of feeling, and His energy of acting. When He exhibits His thinking energy He is the Supreme Lord, when He exhibits His feeling energy He is Lord Vāsudeva, and when He exhibits His acting energy He is Saṅkarṣaṇa Balarāma. Without the Lord's thinking, feeling and acting, there would be no possibility of creation. Although there is no creation in the spiritual world as there is in the material world, both worlds are manifestations of Kṛṣṇa's energy of acting, which He carries out in the form of Saṅkarṣaṇa Balarāma.